Coppercoat is great if you plan to have the boat awhile and are happy to wipe or scrub every few months, costs more initially but cheaper in the long run and more environmentally friendly, we put it on a 38 ft cat and it performed well . gives a fast smooth finish that does not disappear when you scrub.

no coppercoat is hard epoxy resin with copper powder, wiping and scrubbing won,t wear it away

no more often than annually you can lightly take the surface off with fine wet and dry paper and it should last 10 years of this after 3 to 4 months we would have some slime and a couple of tiny barnacles but they were not stuck hard at all, and easily wiped off. we never used sandpaper but did use a green pot scourer pad at times. The boat did feel fast when clean., It was a job to get all the old antifoul off and an epoxy primer on before applying, if it is put on over old antifoul it won,t stick well.